/*
 *日期格式化
	var newDate = new Date();
	newDate.setTime("445555000");
	return newDate.format('yyyy-MM-dd h:m:s');
 */
Date.prototype.format = function(format) {
    var date = {
           "M+": this.getMonth() + 1,
           "d+": this.getDate(),
           "h+": this.getHours()<10?"0"+this.getHours():this.getHours(),
           "m+": this.getMinutes()<10?"0"+this.getMinutes():this.getMinutes(),
           "s+": this.getSeconds()<10?"0"+this.getSeconds():this.getSeconds(),
           "q+": Math.floor((this.getMonth() + 3) / 3),
           "S+": this.getMilliseconds()
    };
    if (/(y+)/i.test(format)) {
    	  format = format.replace(RegExp.$1, (this.getFullYear() + '').substr(4 - RegExp.$1.length));
    }
    for (var k in date) {
       if (new RegExp("(" + k + ")").test(format)) {
              format = format.replace(RegExp.$1, RegExp.$1.length == 1
                     ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));
       }
    }
    return format;
}